Romans 2:25

For truly circumcision profits, if thou do the law: and if thou be a transgressor of the law, thy circumcision has become uncircumcision.

Jeremiah 4:4

Be circumcised to Jehovah, and remove the uncircumcision of your heart, ye men of Judah and inhabitants of Jerusalem; lest my wrath shall come forth as fire, and burn, and none quenching it from the face of the evil of your doings.

Deuteronomy 30:6

And Jehovah thy God circumcised thy heart and the heart of thy seed, to love Jehovah thy God with all thy heart and with all thy soul, for the sake of thy life.

Jeremiah 9:25-26

Behold, the days coming, says Jehovah, and I reviewed over all the circumcised with the uncircumcised;

Acts 7:51

Ye stiffnecked and uncircumcised in heart and ears, ye always resist the Holy Spirit: as your fathers, also you.

Romans 2:23

Thou who boastest in the law, by transgression of the law dishonourest thou God?

Romans 2:28-2

For he in appearance, is not a Jew; neither circumcision, in appearance in the flesh:

Romans 4:11-12

And he received the sign of circumcision, a seal of the justice of the faith which in uncircumcision: for him to be father of all believing through uncircumcision; for justice also to be reckoned to them:

Galatians 5:3-6

And again to any man circumcised, I testify, that he is debtor to do the whole law.

Galatians 6:15

For in Christ Jesus neither circumcision has any power, nor uncircumcision but a new creation.

Ephesians 2:11-12

Wherefore remember, that ye then the nations in the flesh, being reckoned Uncircumcision by the Circumcision in the flesh reckoned made by hands;

Treasury of Scripture Knowledge

Summary

For circumcision verily profiteth, if thou keep the law: but if thou be a breaker of the law, thy circumcision is made uncircumcision.

Bible References

But if

Romans 2:23
Thou who boastest in the law, by transgression of the law dishonourest thou God?
Jeremiah 9:25
Behold, the days coming, says Jehovah, and I reviewed over all the circumcised with the uncircumcised;
Acts 7:51
Ye stiffnecked and uncircumcised in heart and ears, ye always resist the Holy Spirit: as your fathers, also you.